User:Linh N Le/Notebook/2009/07/30

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To Do

  • Play with ice machine

Ice Machime

  • The electronic ice machines came in yesterday and I have been messing with them since
  • They are set to be @ 3°C
  • They use these "Miracle Beads" instead of ice to absorb the heat
  • We left one on overnight filled 80% with beads with a centrifuge tube with tap water.
    • Today, it is hovering about 6-7°C which Koch thinks is alright
      • The VWR is around 5C
  • The display says its at 3C and using the temp probe we have, the block is 3-4C
  • Things to try:
    • Leave the lid off (Koch's Idea). Makes more of a thermal gradient, perhaps causing the block to work harder and cool the beads all the way through
    • Too many beads, use less beads (Q=mc(delta)T, so if Q is constant, less m = more delta T)
    • Beads + water. The booklet says that this causes the thing to cool faster (1hr instead of 2hrs for beads only)